Table 1

Institutions Surveyed, Contacted and Total in the Population, by Income Group
Level of Income
 Surveyed
 Contacted
 Total in Population


Institutions
 Countries
 Institutions
 Countries
 Institutions*
 Countries


No.
 %
 No.
 %
 No.
 %
 No.
 %
 No.
 %
 No.
 %
Low (LI) <$756
 50
 46
 21
 54
 268
 44
 34
 44
 294
 45
 58
 44
Lower Middle (LM) $756–$2,995
 36
 33
 10
 26
 188
 31
 27
 35
 193
 30
 44
 33
Upper middle (UM) $2,996–$9265
 22
 20
 8
 21
 151
 25
 16
 21
 162
 25
 31
 23
TOTAL
 108
 100
 39
 100
 607
 100
 77
 100
 649
 100
 133
 100

*Total institutions in the population were estimated through calculating the ratio of contacted institutions per population within each of UM, LM & LI countries and then expanding to the total population in each region.

Gonzalez Block and Mills Health Research Policy and Systems 2003 1:1   doi:10.1186/1478-4505-1-1